Throttle-valve.



WILLIAM H. WALTERS, F ALTOONA, PENNSYLVANIA.

THROTTLE-VALVE.

Specification of Letters Patent.

Patented July so, 191s.

Application led January 17, 1918. Serial No. 212,306.

T o all 'whom it may concern:

`13e it known that I, Winni M H. WAurEns, a' citizen of the United States, residing at Altoona, in the county of Blair und State of Pennsylvania, have in vented certain new and useful Improvements in Throttlei Yalves, of which the following is a specificai' will be hereinafter i shown in Fig.

of the o Q n r Similar reference numerals refer to sinnbalancing chamber.

tion.

."This invention relates to locomotive boil- ,l0

ers, andhas particular reference to locomo- ,ehthrqttle valves, which are usually positionedn or beneath the locomotive dome. The primary object of this invention is to rovide a locomotive throttle valve with a alancing chamber in connection with u pilot ory relief valve having a pendent stem hnving positioned thereon a valve designed to control. the steam pressure within the valve Another object of this invention is to pro- `vide 'e syste :of cored passages thlvugh which steam isses to the balancinfr chamber after kthe pilot valve is opened and through which the steam escapes iomthe balancing chamber.

With these and many other objects in view which will be nature-of the-invention is 'better understood the samejcnsists-inithe novel construction, combinationl andl arrangement of parts as more' Vfully lillustrated point/cdmail; and claimed. Y

` It wll"be quite readily understood by those hfth nrt Vtithich this invention belongs" thft the sume is susceptible to various ngcsa'nd modifications without departing rom the spirit or scopefof the invention, 'buts' preferredand practical enibodiment tif thesaine is illustrated in the aompeyinsdrawin 1% Which* Figure 1 isa cross' sectional ,view of a throttlovnlve having the present. invention imore readily apparent as the a gli,y thereto aswell as showing a sec-I, W, 0 f throttlechainbcr together niet end elevation of the parts l, having the throttle valve shown in dotted lines.

8 is Vauview showing a modi'ed form balancing chamber regulating valve.

QI .f the throttle valve `operat- `lar -parts throughout the several figures of the drawings. i

' t In carrying outthis invention nofchange metal from that in the valve is contemplated in the locomotive boiler, dome or throttle chamber which is designated in its entirety by the numeral 10, and which consists primarily of an L Shaped casting, provided with an opening 1l, through which the steam enters from the dome of the boiler. The chamber 10 is further provided with an opening 12, which is positioned at right angles to the opening 11, and throu h which steam passes upon entering the ry pipe, which is connected through suitable steam pipes to the steam chest in which is positioned the main valve that controle` the distribution of steam in the locomotive cylinder.

iithin the throttle chamber C, Ythere is provided.. an inwardly projecting ledge or angc 13, which is formed integral with the casting, having machined thereon a ledge or shoulder 14, against which there is adapted to rest a colla'r 15, made integral with an angular valve seat 1G. This valve seat 16 is preferably made of a different chamber, the metals having a different coefficient of expansion so as to more readily accommodate itself to thc varying temperature conditions of the boiler as well as to provide a valve seatthat will not rust thus insuring aperfeet seat for the coacting valve 17 which is deiigned to control the supply of steam from the locomotive boiler to the dry pipe.

f The valve 17 is preferably made of the usual approved construction, having guide win s 18, which are adapted to engage the insi e 19 ofthe annulaivalve seat ring 20, thereby insuring a perpendicular lift of the valve.

The valve 17 is furtherprovided with a central opening 21, aroundiwhich is formed a valve seat 22, adaptel to' coact with a valve 23, formed `integra ly with a stem 24, which carries a piston valve 25, adapted to travel in a vertical lane in the piston chamber 26. The chamber 26 is provided with a steam port 27 through which steam may escape from a valve balancing chamber 28. On either sideof the piston valve chamber there is provided steam ports 29 which steam enters from the boiler to tie balancing chamber and through which steam must ass to the chamber release port 27. It will) throu h i be readily noticed .that the valve is providedA with; a pendentfbell shaped p il' enllul' h2.. the lower hier ot' whieh forms a shoulder till airainht which iuipinges a shoulder lll positioned upon the balance piston tlf, which is designed to travel iu a vertical plane in the balancingr chamber 2S. y

The operation of this valve may be de scribed as followe1- An outward pull on the throttle valve operating rod titi, by virtue ol' the introduction of the hell crunk 23T results in an upward nlovement of the linlt element 3B. which motion is transferred to the yoke 3*.) positioned above the valve 17. The yoke 39 is provided with vertical guidingr moans m the form of a `slot -ltl which is shown cast integral with the periphery of the top por tion -ll ol the valve chamber lt). Inter posed between thiI yolte 3U and the valve lil there is a link l2, preferably bii'nri'ated at the top end. and inning a pin connection 425 with the volte liti. 'l`hr lower end ll of thi` link 12 is adapted to have a pin connor.v tion -l with the bifurcated exten-ion lil of the valve 23 as shown in Vig. l olA the dra wings.

Obviously an upward linlt will impart a like movement to valve 23 perniitt.ingr the saine to leave the valve seat. 22 allowingsteam from thil loro motive boiler donn` to pass into the cavity 4.7,which surrounds the pendent stem l which carries a pistou valve 2, positioned so as to close the port` 2T when the valve 23 is opened, thus directing the steam through the ports 2t) to the balancingy rlnnnbt-r 2S raisingr the valve 35 together with the valve 17 at. which time steam readily Hows troni the locomotive boiler dome through tho valve opening 48 to the opening it), from whence it flows through the dry pipe to the steam chest. and thence to the locomotive cylinders. The balancing of the valve 17 takes place almost. instantaneously with the opening of the valve 23 and Since the valve becomes balanced with the opening of the valve 23 it obviously becomes easy for the engineman to control the throttle opening at. will. Upon closing the throttle valve 17 the engineman first closes the pilot vulve 23 which at once, opens port 27 leaviyug the steam escape from the balancing chamber 28, the valve 1.7 is then easily closed.

Referring; now to Fig. 25 it will be observed that the piston valve 25 is replaced by zr cone shaped valve 50, while the valve seat 51 is an integral part of the bell shaped pendent portion 30, )referably made integral with the valve 1 When the valve 23 is lifted from its seat 22 the cone shaped valve 50 approaches its Seat 51. The steam then passes from the boiler dome intoY the cavity 47 from thence ,it passes through ports 29 to the balancing chamber 28. In this construction the stiin'i from the balancing chamber escapes through movement ot thc.

the"

the opening o2. Vl'hile no claim will be laid upon this particular shape of cone valve it` should be readily understood that the method o" arranging the ports 2t) in `the bell shaped pendent portioilof the valve 17 is a part of the present invention and the same will be sety forth in the appended claims.

From the above description it is believed that the man v advantages of the herein de- ,seribed throttle valve mechanism will be readily apparent` to those skilled in the art to which this invention belongs, and what l elaiin and desire to be covered by Letters latent. is-

1. ln a throttle valve, in combination, a throttle chamber open at its upper end and having!` its lower end connected to the dry pipe. a removable valve Seat positioned withui the throttle chamber adjacent4 the upper end opening, a valve adapted to cooperate with the seat, a pendent bell shaped portion for the valve, a central opening in the valve and a piston adapted to operate in the opening and have a vertical movement therein.

2. In a throttle valve, in combination, a hrottle chamber having an opening'in its upper end and having its lower end secured to the dry pipe, a valve seat, a ledge cast integral with the. valve chamber for holding'the valve seat., a vertically movable valve adapted to coact with the valve seat, a central opening in the valve, a balancing chamber, a piston adapted to have a vertical moven'ient in thtl chamber, and a valve seat l'ormed integral with the said movable throttle valve. a valve ctmcting with the valve seat such as to control the flow of steam to the balancing chamber, a stem held pointent from the valve carrying means f r eontrolling' the egress of steam from tie balancing chamber.

ln combination with a throttle valve, a chamber for the valve, an orifice in the top of the chamber forndinitting steam to the throttle valve, e bell shaped pendent body on the said valve, a. collar on the bell portion, a balancing chamber, a piston ada ptcd to coact with the said throttle valve and have a vertical movement. within the chamber, a central opening in the valve, a. piston valve, a portt in the pendent bell `haped portion adapted to be open and closed by the piston valve and a plurality of steam ports within the bell shaped portion ofy the valve through which steam may pass to and from the balancing chamber.

4. In combination with n throttle valve, e chamber for the valve, means'for admitting steam to the valve, a valve seat, a valve enacting with the seat., endent. wings on t e valve a balancing c amber, a. piston p rtion ol the valve having vertical movement within the chamber, a pilot. valve,- a'. seat in the seid throttle valve coacting with the pilot valve, u, pendent Stem carried by and closing Vthepilol; valve and the throttle the valve, a piston on the stern, an exit steam vulve. 10 port adapted to be covered and uncovered In testimony whereof I alX my signature by the pieton valve when balancing the in the presence of two Witnesses.

6 valve, steam ports in the pendent bell of the WILLIAM H. WALTERS.

valve for conducting steam around the walls Witnesses: of the Piston valve cylinder t0 and from the J. T. HANLON,

balancmg chamber. and means for opening J. L WEm'zERGER. 

